The game doesn't include what was said would be included right up until release and denying that is dishonest.
Like what?
The only think I can think of is Epiloge which was to take place in the upper city, which was scrapped due to it being too long. So it is not coming back, but instead Larian was working on snappier ending (camp epilogue, and soon to come expanded evil endings).
Exploring the upper city, consequences for the tadpole overuse, the many ending and so on.
